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Finding the Fourth Proportional to 30,480.80, 42,062.04 and 19,156.16

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Solution

The fourth proportional to 30,480.80, 42,062.04 and 19,156.16 is: 26,434.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,480.80 : 42,062.04 = 19,156.16 : x
  2. Step 2: Convert to fraction form
    30,480.80/42,062.04 = 19,156.16/x
  3. Step 3: Cross multiply
    30,480.80x = 42,062.04 × 19,156.16
  4. Step 4: Simplify right side
    30,480.80x = 805,747,168.17
  5. Step 5: Solve for x
    x = 805,747,168.17/30,480.80
  6. Step 6: Final answer
    x = 26,434.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.